No timeout after an ESC key pressed in emacs mode

thread 'main' panicked at 'already borrowed: BorrowMutError'

Ensure 0 previous rows are removed when calling refresh on a freshly
created State. Before, 0+ rows were removed on an initial State
refresh. If the prompt had a newline in it, a positive number of rows
were removed, clearing past output in stdout.

Fix #109

Oops

Not tested

Only displayed on unix terminal.
For windows, we will have to remove ANSI escape sequence when
there is no support for ANSI colors (Windows < 10).